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• Cannot watch RTSP stream from Live555 using FFMPEG

  30 octobre 2023, par bobku123

  I am trying to create an RTSP server using Live555, with the stream source being raw h264 video of my USB webcam encoded with FFMPEG, sent over UDP.

  


  I have used BasicUDPSource from Live555 sources as my FramedSource class. I created my own MediaSubsession class as per the Live555 FAQ. Here is the source code I created so far :

  


  #include "liveMedia.hh"

#include "BasicUsageEnvironment.hh"
#include "announceURL.hh"
#include "FFMPEGH264StreamMediaSubsession.hh"
#include "BasicUDPSource.hh"
#include "H264VideoStreamFramer.hh"
#include "H265VideoRTPSink.hh"

UsageEnvironment* env;

// To make the second and subsequent client for each stream reuse the same
// input stream as the first client (rather than playing the file from the
// start for each client), change the following "False" to "True":
Boolean reuseFirstSource = False;

// To stream *only* MPEG-1 or 2 video "I" frames
// (e.g., to reduce network bandwidth),
// change the following "False" to "True":
Boolean iFramesOnly = False;

static void announceStream(RTSPServer* rtspServer, ServerMediaSession* sms,
               char const* streamName, char const* inputFileName); // forward


int main(int argc, char** argv) {
  // Begin by setting up our usage environment:
  TaskScheduler* scheduler = BasicTaskScheduler::createNew();
  env = BasicUsageEnvironment::createNew(*scheduler);

  UserAuthenticationDatabase* authDB = NULL;

  // Serve regular RTSP (over a TCP connection):
  RTSPServer* rtspServer = RTSPServer::createNew(*env, 8554, authDB);

  if (rtspServer == NULL) {
    *env << "Failed to create RTSP server: " << env->getResultMsg() << "\n";
    exit(1);
  }

  char const* descriptionString = "Session streamed by \"testFFMPEGRTSPServer\"";

  {
    char const* streamName = "FFMPEGRTSPStream";
    ServerMediaSession* sms
      = ServerMediaSession::createNew(*env, streamName, streamName,
                      descriptionString);
    sms->addSubsession(FFMPEGH264StreamMediaSubsession
               ::createNew(*env, reuseFirstSource));
    rtspServer->addServerMediaSession(sms);

    announceStream(rtspServer, sms, streamName, "ffmpeg");
  }

  env->taskScheduler().doEventLoop(); // does not return
}

static void announceStream(RTSPServer* rtspServer, ServerMediaSession* sms,
               char const* streamName, char const* inputFileName) {
  UsageEnvironment& env = rtspServer->envir();

  env << "\n\"" << streamName << "\" stream, from the file \""
      << inputFileName << "\"\n";
  announceURL(rtspServer, sms);
}

FFMPEGH264StreamMediaSubsession*
  FFMPEGH264StreamMediaSubsession::createNew(UsageEnvironment& env, Boolean reuseFirstSource)
{
    return new FFMPEGH264StreamMediaSubsession(env, reuseFirstSource);
}

FFMPEGH264StreamMediaSubsession::FFMPEGH264StreamMediaSubsession(UsageEnvironment& env, Boolean reuseFirstSource) 
                : OnDemandServerMediaSubsession(env, reuseFirstSource)
{

}

FFMPEGH264StreamMediaSubsession::~FFMPEGH264StreamMediaSubsession()
{

}

FramedSource* FFMPEGH264StreamMediaSubsession::createNewStreamSource(unsigned clientSessionId,
                          unsigned& estBitrate)
{
  estBitrate = 500; // kbps, estimate

  // Create the video source:
  // Create a 'groupsock' for the input multicast group,port:
  char const* inputAddressStr = "192.168.1.100";

  NetAddressList inputAddresses(inputAddressStr);
  struct sockaddr_storage inputAddress;
  copyAddress(inputAddress, inputAddresses.firstAddress());

  Port const inputPort(8888);
  unsigned char const inputTTL = 0; // we're only reading from this mcast group

  Groupsock inputGroupsock(envir(), inputAddress, inputPort, inputTTL);

  // Then create a liveMedia 'source' object, encapsulating this groupsock:
  FramedSource* source = BasicUDPSource::createNew(envir(), &inputGroupsock);

  // Create a framer for the Video Elementary Stream:
  return H264VideoStreamFramer::createNew(envir(), source);
} 

RTPSink* FFMPEGH264StreamMediaSubsession::createNewRTPSink(Groupsock* rtpGroupsock,
                                    unsigned char rtpPayloadTypeIfDynamic, FramedSource* inputSource)
{
    return H265VideoRTPSink::createNew(envir(), rtpGroupsock, rtpPayloadTypeIfDynamic);
}


  


  I converted my USB webcam to H264 stream using the following FFMPEG command :

  


  ffmpeg -video_size 1280x720 -framerate 30 -input_format mjpeg -f v4l2 -i /dev/video0 -c:v h264_nvenc -bf 0 -g 30 -bsf:v 'filter_units=remove_types=35|38-40' -f h264 udp://192.168.1.100:8888


  


  However when I try to play it with FFPLAY using the following, I do not get any output :

  


  ffplay rtsp://192.168.1.100:8554/FFMPEGRTSPStream


  


  What am I doing wrong ?

  


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